Oil-cup for air-pumps.



PATENTBD" APR. 9, 1907.

. W. v. TURNER.

OIL 0UP FOR AIR PUMPS. APPLIUATI ON FILED JULY 6, 1903. B.ENEWED APR. 19, 1906.

v im m view of the nip UNITED STATES PATENT OFFICE.

WVALTER V. TURNER, OF WILMERDING, PENNSYLVANIA, ASSIGNOR, BY DIRECT AND MESN E ASSIGNMENTS, TO THE WESTINGHOUSE AIR BRAKE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

OIL-CUP" FOR AIR-PUMPS.

Specification of Letters Patent.

: tented April 9, 1907.

To all whom it may concern:

Be it known that I, WALTER V. TURNER, a citizen of the United States, residing at Wilmerding, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Oil-Cups for Air-Pumps, of which the following is a specification.

This invention relates to that class of oilcups adapted to be used in connection with air-pumps of air-brake systems.

The principal object of the invention is to provide a simple, economical, and 'efiicient oil-cup for air-brake pumps, with mechanism by which it is automatically operated during the operation of the pump and remains substantially inoperative at other times.

Other and further objects will appear from an examination of the drawings and the following description and claims.

The invention consists principally in an oil-cup for air-pumps in which there are combineda body portion provided with an oilchamber and an oil-outlet passage having an atmospheric-pressure port and an automatic spring-pressed valve closing the oil-outlet passage.

The invention consists, further and finally, in the features, combinations, and details of construction hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of one type of oll-cup for airpumps as it appears when constructed in accordance with these improvements; Fig. 2, a sectional elevation of the same, taken at or about the verticlal center; and Fig. 3, a plan In the art td which this invention relates it is well known that it is very desirable to have an oil-cup for air-pum s so constructed and arranged that it may e automatically operated during the movements or operation of the air-pump and remain substantially inoperative at all other times. To this end this invention is principally designed.

In constructing an oil-cup for air-pumps in accordance with these lmprovements I make a body portion a, which provides an oil chamber or reservoir b. This oil-chamber is closed by means of a cap portion a, that has screw-threaded engagement with the upport on, as shown paran atmospheric port or passage f, radiallyconnected therewith and extending upwardly through the body portion of the cup to a point at the upper part thereof. To open and close this oil-outlet passage, or, in other words, to control the supply of oil thereto, a needle-valve g is providedhaving a threaded portion h and wing portion i. The threaded portion of this needle-valve is engaged with an upwardly-extending hub in the oilchamber, so that by turning it one way con1- munication is opened between the passage 7c, that forms the inner portion of the oil-outletsupply passage, and the main portion e thereof. An opposite turning movement of the needle-valve will completely or partially close such passage to regulate or restrict the size of the opening, so that the amount of oil fed therethrough may be regulated to suit different circumstances and conditions.

To provide for the automatic feeding of the oil into the air-pump Z, the oil-outlet passage in the stem of the oil-cup body is provided with an enlargement m, and in it is arranged a check-valve n, having wing portions 1) thereon to assist it in its rectilinear movements. The lower part of this stem portion has threaded engagement with a nipple 9, that closes the enlargement of the oil-outlet passage, but has a continuation r of such passage connected with the enlarged portion thereof by means of a plurality of small passages s. The check-valve is provided with a depending stem portion t, entering a perforation in the nipple portion, which assists to guide or hold said valve in its desired move ments.

A helical spring at is located below .the check-valve for normally holding the same to its seat with a certain pressure, whereby when the pump is not working the oil which drips past the need e-valve collects in the ports c and f, but is prevented from entering the pump by check-valve n. As the passage into the outlet-passage, a check-valve in said f leads to the upper portion of the cup, there will be no overfiow of this oil to the outside of the cup. When the pump begins working with suiiicient rapidity to open the checkvalve n, the oil which has collected in the passage f above the same is immediately drawn into the pump and thoroughly lubricates the same at the start. Then at each suction-stroke of the pump, which opens the check-valve, only such small quantity of oil as regulated by the needle-valve will be fed to the pump. The rate of flow of oil past the needle-valve will not be affected by the suction of the pump, since the inlet-port f provides for a free intake of air at a point between the needle-valve and check-valve. Consequently for any given adjustment the feed will be constant and uniform.

I claim 1. A lubricator for air-pumps, comprising an oil-chamber, an outlet-passage leading from said chamber to the pump, a valve for controlling the flow of oil into said outletpassage, an air-inlet port leading from said outlet-passage to a point at the upper portion of the oil-chamber, and a check-valve in said outlet-passage.

2. A lubricator for air-pumps, comprising an oil-chamber, an outlet-passage leading therefrom to the pump, a needle valve for controlling the flow of oil from the chamber passage, and an air-inlet port leading from a point in said passage above the check-valve to the upper portion of the oilchamber.

3. A lubricator comprising an oil-chamber, an outlet-passage leading from said chamber, an air-inlet port having a restricted opening communicating with said passage to a point at the upper portion of the oil-chamber, and a check-valve in said outlet passage.

4. A lubricator comprising an oil-chamber having an outlet-passage, a restricted opening communicating between the lower part of the oil-chamber and the outlet-passage, a check-valve in said passage, and an air-inlet port leading from said outlet-passage to the upper part of the oil-chamber and having free open communication with said checkvalve.

5. A lubricator for air-pumps, comprising an oil-chamber, an outlet-passage leading from said chamber to the pump, a restricted opening communicating between the lower part of the oil-chamber and the outlet-passage, an air-inlet port leading from said passage to the upper part of the oil-chamber, a check-valve controlling said passage, and a spring to hold said valve seated.

l/VALTER V. TURNER. Witnesses:

HARRY IRWIN CROMER, ROBERT H. WILES. 

